[FIXED JENKINS-21622] Release workspace leases (and avoid @2) even if...

[FIXED JENKINS-21622] Release workspace leases (and avoid @2) even if post-build actions throw LinkageError.

changelog.html

@@ -58,6 +58,9 @@ Upcoming changes</a>
   <li class=bug>
     More efficient deletion of old builds (specified by date).
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-22607">issue 22607</a>)
+  <li class=bug>
+    Linkage errors in notifiers could leak workspace leases.
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-21622">issue 21622</a>)
   <li class=bug>
     Fix a bug which only showed the first detail part for radio buttons.
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-22583">issue 22583</a>)

core/src/main/java/hudson/model/AbstractBuild.java

@@ -712,17 +712,23 @@ public abstract class AbstractBuild<P extends AbstractProject<P,R>,R extends Abs
                             r = false;
                         }
                     } catch (Exception e) {
-                        String msg = "Publisher " + bs.getClass().getName() + " aborted due to exception";
-                        e.printStackTrace(listener.error(msg));
-                        LOGGER.log(WARNING, msg, e);
-                        if (phase) {
-                            setResult(Result.FAILURE);
-                        }
+                        reportError(bs, e, listener, phase);
+                    } catch (LinkageError e) {
+                        reportError(bs, e, listener, phase);
                     }
             }
             return r;
         }
 
+        private void reportError(BuildStep bs, Throwable e, BuildListener listener, boolean phase) {
+            String msg = "Publisher " + bs.getClass().getName() + " aborted due to exception";
+            e.printStackTrace(listener.error(msg));
+            LOGGER.log(WARNING, msg, e);
+            if (phase) {
+                setResult(Result.FAILURE);
+            }
+        }
+
         /**
          * Calls a build step.
          */